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(No Model.) v Y 2 Sheets-Sheet 1.

J. A. HUNTER & F. KNIGHT.

' LOOK HINGE;

'No. 452,478. Patented May 19, 1891.

-(No Model.) 2 SheetS -Sheet 2.

J. A. HUNTER & F. H. KNIGHT. LOCK HINGE.

No. 452,478. PatentedMaJ-y 19,1891.

UNITED STATES PATENT OFFIQE.

JOHN A. HUNTER, or GETTYSBURG, PENNSYLVANIA, AND FRANK. I-I. KNIGHT, orWASHINGTON, DISTRICT OF COLUMBIA.

HINGE.

SPECIFIGATION forming part of Letters Patent No. 452,478, dated May 19,1891.

Application filed March 17, 1891.

To all whom it may concern:

Be it known that we, JOHN A. HUNTER, of Gettysburg, in the county ofAdams and State of Pennsylvania, and FRANK. H. KNIGHT, of lVashington,in the District of Columbia, have invented certain new and usefulImprovements in Hinges; and We do hereby declare the following to be afull, clear, and exact description of the same, reference being had tothe accompanying drawings, forming a part of this specification, and tothe letters of reference marked thereon.

This invention relates to improvements in that class of hinges designedparticularly for use on window blinds or shutters; and it consists inthe novel construction and combination of parts hereinafter specificallydescribed and claimed.

Referring to the accompanying drawings, Figure l represents a side viewof the parts composing our improved hinge, the same being detached. Fig.2 is a top plan view of the same. Fig. 3 is a sectional view taken onthe line 1] 11 Fig. 1; Fig. 4, a sectional view taken on the line a as,Fig. 1. Fig. 5 is a side elevation of the hinge, showing the partsconnected and in open locked position. Fig. 6 is a sectional plan viewtaken on the line m 00, Fig. 5. Fig. 7 is a top plan View showing theposition of the parts while unlocked and capable of being turned.

Similar letters of reference in the several figures indicate the sameparts.

The letters A and B indicate the two parts of the hinge, the formerconstituting what is known as the fixed leaf and the latter the swingingleaf.

The fixed leaf A is provided with a pintle A ,Whose upper portion a ismade, preferably, cylindrical, but whose body portion is recessed atopposite sides, so as to form alongitudinal rib a, as shown particularlyin Figs. 1, 3, 4, and (3. In rear of the pintle A the leaf is formedwith projections 66 a extending out on opposite sides, as shown in Figs.1, 2, and 3, while in front of the pintle an extension a is provided,for a purpose to be presently explained.

The swinging leaf B is provided with a socket portion 1), having a mainaperture 1') Serial No. 385.409. (N0 model.)

extending vertically through it, of sufficient size to accommodatewithout binding the cylindrical portion of the pintle A, (see Figs. 2and 7,) and having also a slot 12 leading into appropriate times thelongitudinal rib a of the pintle. The upper and lower surfaces of thesocket portionb are made rounding orinclined, as shown at b b Figs. 1and 5, and

operation with the extension a of the stationary leaf when the parts arelocked together, and it will be noted that the projection a issubstantially horizontal. Thus when the the inclines lift the projection12 over the projection a doing away with the necessity of anycomplicated arrangement of locking projections.

intended for, use only on the lower portion of a blind or shutter, theupper portion of the latter being supported by an ordinary hinge, suchas now found in the market.

of the parts of the hinge when locked together 'will be seen. It will benoted that the movable leaf B is drawn outward so as to bring thelocking-rib a into the locking-recess b stands below and behindtheprojection d Then it is desired to unlock the parts and turn the movableleaf, the latter is pushed inwardly slightly, which has the effect todisto cause the inclined or rounded lower surface b to ride up onto theprojection (4 and thus raise the lug b abovethe plane of the top of theprojection a A slight turn of the further rise by the action of therounded surface b so as to carry the upper portion of the slot b abovethe rib a and opposite the cylindrical portion a of the pintle, therebyout liability of re-engagement. Upon the turning of the movable leafback to first position the parts will become automatically looked, asbefore.

said main aperture-b, for receiving at the lugs or projections areformed at b b for 00- leaves are moved bodily toward each other 6 Itshould be understood that our hinge is By reference to Figs. 5 and 6 theposition of the fixed leaf, and also that the lug b engage the rib afrom the recess 12 and also movable leaf will now cause the said leaf toenabling the movable leaf to freely turn with- The movable leaf is-madealike at top and bottom, so as to be reversible, as will be readilyunderstood.

By rccessing the pin to form the lockingrib and forming a recess in thesocket it will be seen that when the rib is Withdrawn from the recessand given even a very slight turn the playof the pin in the socket isabsolutely prevented, as the pin then fits snugly into the socket.Further, it will be seen that byforming the rounded bearing above therecess or in position to bear against the cylindrical upper end of thepin when elevated by the incline a broad bearing-surface is afforded tosustain the wear in opening and closing the shutter.

\Ve claim as our invention- 1. In a hinge, the combination, with theleaf having the substantially cylindrical pin recessed at opposite sidesto form the lockingrib formedintegral therewith, of the leaf having thesocket for the pin with the recess at one side for the reception of thelocking-rib, substantially as described.

2. In a hinge, the combination, with the leaf having the cylindrical pinrecessed at opposite sides throughout a portion of its length to formthe locking-rib, of theleaf having the socket for the pin with the shortrecess at one side for the reception of the locking-rib and the inclinefor throwing the rib into the recess, substantially as described.

3. In a hinge, the combination, with the leaf having the pin with thelocking-rib, of the leaf having the socket with the rounded bearings forthe pin at top and bottom and the short central recess for thelocking'rib, substantially as described.

4. In a hinge, the combination, with the leaf having the pin with thecylindrical upper portion and lower portion recessed to form alocking-rib, of the leaf having the socket with the rounded bearing forthe pin at the top, the recess for the rib below the rounded hearing,and the incline for lifting the rounded bearing above the locking-rib,substantially as described.

5. In a hinge, the combination, with the leaf having the cylindricalpin, locking-rib, and substantially horizontal projection 60', of theleaf having the elongated socket for the pin, the recess and downwardprojection l)", and the inclines for disengaging said projections bymoving the leaves vertically with relation to each other, substantiallyas described.

6. In a hinge, the combination, with the leaf having the cylindrical pinwith the locking-rib, of the leaf having the socket for the pin with therecess for the locking-rib, said socket having the inclined or roundedbearing'surfaces at top and bottom, and eo-operating projections on eachside of the pin, whereby the socket-leaf may be reversed, substantiallyas described.

7. Thecornbination of the fixed leaf having the pintle recessed atopposite sides to form the locking-rib, and having the projection a withthe reversible movable leaf having the socket portion provided with thelarge aperature and the recess leading into the same, and with theinclined or rounded bearing-surfaces at top and bottom, substantially asdescribed.

S. The combination of the fixed leaf having the pintle recessed atopposite sides to form the locking-rib, and having also the projectionsa and the extension a with the reversible leaf provided with theaperture and recess, as described, and also provided with the inclinedor rounded bearing-surfaces at top and bottom, and with the lugs I)",substantially as described.

JOHN A. HUNTER. FRANK. H. KNIGHT.

Witnesses:

MELVILLE CHURCH, ALEX. S. STEWART.

